Pilot hole for a #14 wood screw
Hardwood
11/64"
Softwood
5/32"
Use a standard twist drill of this size for the threaded part of a #14 screw. Oak, maple and other dense woods take the larger bit.
Using a taper-point (countersink) bit set? Those sizes are 1/4" for hardwood and 15/64" for softwood.
#14 wood screw pilot hole sizes
| Screw diameter | 0.242 in 6.15 mm |
|---|---|
| Hardwood, standard bit | 11/64" 0.1719 in |
| Softwood, standard bit | 5/32" 0.1562 in |
| Hardwood, taper-point bit | 1/4" 0.2500 in |
| Softwood, taper-point bit | 15/64" 0.2344 in |
Which size to pick
A pilot hole lets the screw thread bite without splitting the wood. If the screw turns hard or the wood starts to split, go up one bit size. If it spins without holding, go down one.
Test on a scrap piece first. Wood density varies, so the same species can call for a different size.
These sizes are for the threaded section only. The upper board needs a clearance hole the size of the screw's smooth shank.
Tools for this job
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